Power system and towing excavator

Abstract

The utility model relates to the technical field of excavators, and discloses a power system and an electric excavator. The power system comprises a whole vehicle platform, a generator, a compressor and an auxiliary driving force component. The generator is installed on the whole vehicle platform and used for supplying power to the whole vehicle low-voltage storage battery. The compressor is installed on the whole vehicle platform and used for providing power for the whole vehicle air conditioning system. The auxiliary driving force component is installed on the whole vehicle platform, connected with the generator and the compressor and used for driving the generator and the compressor to rotate. According to the utility model, a DC / DC module and an AC / DC module do not need to be arranged, and a high-voltage electric compressor can not be adopted, so that the problems of high whole machine cost and low whole machine reliability of an electric excavator in the prior art are solved.

Description

Technical Field

[0001] The utility model relates to the technical field of excavators, in particular to a power system and a towed electric excavator. Background Art

[0002] Electrification represents the future of construction machinery. For small-scale fixed-point construction conditions such as scrap steel, mining, feeding, and automobile dismantling, towed electric hydraulic excavators can operate sustainably and efficiently without endurance anxiety compared to pure electric excavators. Compared with traditional fuel hydraulic excavators, the whole machine has zero emissions, no pollution, low noise, and eliminates the complex maintenance of diesel engines. More importantly, electricity can save high operating costs compared to oil, creating greater value for users. However, the existing towed electric excavators have low environmental adaptability, poor reliability, high service threshold, difficult maintenance, and high cost. Therefore, how to reduce the cost of the whole machine and improve the reliability of the whole vehicle is an urgent problem to be solved in the industry. Utility Model Content

[0003] The utility model provides a power system and a towed electric excavator, which are used to solve the problems of high whole machine cost and low whole vehicle reliability existing in the towed electric excavator in the prior art.

[0004] The utility model provides a power system, comprising:

[0005] Vehicle platform;

[0006] A generator, installed on the vehicle platform, for supplying power to the low-voltage battery of the vehicle;

[0007] A compressor, installed on the vehicle platform, for providing power for the vehicle air conditioning system;

[0008] An auxiliary driving force component is installed on the vehicle platform, and the auxiliary driving force component is respectively connected to the generator and the compressor to drive the generator and the compressor to rotate.

[0009] According to the power system provided by the utility model, the auxiliary driving force component includes:

[0010] A first transmission assembly and a second transmission assembly;

[0011] An auxiliary driving force source, wherein the power output shaft of the auxiliary driving force source is drivingly connected to the generator through the first transmission assembly, and is drivingly connected to the compressor through the second transmission assembly.

[0012] According to the power system provided by the utility model, the power output shaft is provided with a first annular groove and a second annular groove around the rotation center axis of the power output shaft; the first transmission assembly includes a first transmission belt; the second transmission assembly includes a second transmission belt;

[0013] The two ends of the first transmission belt are respectively sleeved on the first annular groove and the generator; the two ends of the second transmission belt are respectively sleeved on the second annular groove and the compressor.

[0014] According to the power system provided by the utility model, the power system further includes an installation and adjustment component, and the installation and adjustment component includes:

[0015] a first mounting and adjusting bracket, mounted on the vehicle platform and located at one side of the auxiliary driving force component; the first mounting and adjusting bracket has a first adjusting portion, the first adjusting portion is connected to the generator and is used to adjust the mounting position of the generator to change the tension of the first transmission belt;

[0016] The second mounting and adjusting bracket is mounted on the vehicle platform and is located on the other side of the auxiliary driving force component away from the generator; the second mounting and adjusting bracket has a second adjusting portion, which is connected to the compressor and is used to adjust the mounting position of the compressor to change the tension of the second transmission belt.

[0017] The power system provided by the utility model also includes:

[0018] A fan power component is installed on the vehicle platform;

[0019] A mechanical cooling fan is installed on the vehicle platform and is used to dissipate heat for the radiator. The driving end of the fan power component is connected to the mechanical cooling fan and is used to drive the mechanical cooling fan to rotate.

[0020] According to the power system provided by the utility model, the fan power component includes:

[0021] A first mounting bracket is mounted on the vehicle platform;

[0022] A fan power source is installed on the first mounting bracket, and the fan power source is connected to the mechanical cooling fan to drive the mechanical cooling fan to rotate forward or reverse.

[0023] The power system provided by the utility model also includes:

[0024] The main pump power component is installed on the vehicle platform, and the main pump power component is used for plug-in connection with the hydraulic pump.

[0025] According to the power system provided by the utility model, the main pump power component includes a permanent magnet synchronous motor and a second mounting bracket; the permanent magnet synchronous motor is connected to the vehicle platform through the second mounting bracket, and the driving end of the permanent magnet synchronous motor is used for plug-in connection with the hydraulic pump.

[0026] The power system provided by the utility model also includes:

[0027] Shock absorber, the second mounting bracket is connected to the vehicle platform through the shock absorber.

[0028] The utility model also provides a towed electric excavator, comprising any power system described above.

[0029] The power system and the towed electric excavator provided by the utility model are provided with a generator, and the generator is connected to the auxiliary driving force component, and the auxiliary driving force component is used to drive the generator to rotate to supply power to the low-voltage battery of the whole vehicle. Compared with the existing towed electric excavator, that is, the solution of the DC / DC module and the AC / DC module supplying power to the low-voltage battery of the whole vehicle, the utility model does not need to provide the DC / DC module and the AC / DC module, thus solving the problems of high vehicle cost, low environmental adaptability and poor reliability caused by the DC / DC module and the AC / DC module. By providing a compressor, and connecting the compressor to the auxiliary driving force component, the auxiliary driving force component is used to drive the compressor to rotate to provide power to the air conditioning system of the whole vehicle. Compared with the existing towed electric excavator solution that the air conditioning of the whole vehicle is driven by a high-voltage electric compressor, the utility model does not need to use a high-voltage electric compressor, thus solving the problems of high vehicle cost, low environmental adaptability and poor reliability caused by the high-voltage electric compressor. Therefore, the utility model solves the problems of high machine cost and low vehicle reliability of towed electric excavators in the prior art. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the technical solutions in the present invention or the prior art, a brief introduction will be given below to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0031] Figure 1 It is a structural schematic diagram of the power system provided by the utility model.

[0032] Reference numerals:

[0033] 10. Power system; 20. Hydraulic pump; 30. Radiator;

[0034] 100, vehicle platform; 200, generator; 300, compressor;

[0035] 400, auxiliary driving force component; 410, first transmission assembly; 420, second transmission assembly; 430, auxiliary driving force source;

[0036] 510, first installation and adjustment bracket; 520, second installation and adjustment bracket;

[0037] 600, fan power component; 610, first mounting bracket; 620, fan power source;

[0038] 700, mechanical cooling fan;

[0039] 800, main pump power component; 810, second mounting bracket; 820, permanent magnet synchronous motor;

[0040] 900. Shock absorber. DETAILED DESCRIPTION

[0041] In order to make the purpose, technical solution and advantages of the utility model clearer, the technical solution of the utility model will be described clearly and completely in conjunction with the drawings in the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0042] The power source of the existing towed electric excavator is usually developed for urban vehicles, and a single motor is often used to drive a hydraulic pump to provide power for the excavator; the low-voltage power supply of the whole vehicle is powered by a DC / DC or AC / DC module to supply power to the low-voltage battery of the whole vehicle; the air conditioner of the whole vehicle is driven by a high-voltage electric compressor; the heat dissipation system is driven by a low-voltage electronic fan to dissipate heat for the whole machine. If the current towed electric excavator is used for non-road machinery, the working conditions of non-road machinery are worse than those of urban vehicles, and there are usually large dust, high temperature, high humidity and large vibration. Therefore, electronic devices such as DC / DC modules, AC / DC modules, high-voltage electric compressors and electronic fans are prone to failure under the working conditions of non-road machinery, making the environmental adaptability of the whole vehicle low, the reliability poor, the service threshold high, the maintenance difficult and the cost high, and the probability of automatic shutdown of the whole vehicle increases. Therefore, in order to solve at least one of the above problems, the utility model provides a power system and a towed electric excavator.

[0043] Combine the following Figure 1 The power system of the utility model is described in detail. Figure 1 It is a structural schematic diagram of the power system provided by the utility model.

[0044] like Figure 1 As shown, a specific embodiment of the first aspect of the present utility model provides a power system 10. The power system 10 includes a vehicle platform 100, a generator 200, a compressor 300 and an auxiliary driving force component 400.

[0045] The generator 200 is installed on the vehicle platform 100 to supply power to the low-voltage battery of the vehicle. The compressor 300 is installed on the vehicle platform 100 to provide power to the air conditioning system of the vehicle. The auxiliary driving force component 400 is installed on the vehicle platform 100, and the auxiliary driving force component 400 is connected to the generator 200 and the compressor 300 respectively, and is used to drive the generator 200 and the compressor 300 to rotate.

[0046] In this embodiment, a generator 200 is provided, and the generator 200 is connected to an auxiliary driving force component 400, and the auxiliary driving force component 400 is used to drive the generator 200 to rotate to supply power to the low-voltage battery of the vehicle. Compared with the existing towed electric excavator, that is, the solution of supplying power to the low-voltage battery of the vehicle by a DC / DC module and an AC / DC module, this embodiment does not need to provide a DC / DC module and an AC / DC module, thereby solving the problems of high vehicle cost, low environmental adaptability and poor reliability caused by the DC / DC module and the AC / DC module.

[0047] By setting a compressor 300, and connecting the compressor 300 to the auxiliary driving force component 400, the auxiliary driving force component 400 is used to drive the compressor 300 to rotate to provide power to the air conditioning system of the whole vehicle. Compared with the existing towed electric excavator, that is, the solution of driving the whole vehicle air conditioning by a high-voltage electric compressor, this embodiment does not need to use a high-voltage electric compressor, thereby solving the problems of high vehicle cost, low environmental adaptability and poor reliability caused by the high-voltage electric compressor. Therefore, this embodiment solves the problems of high whole machine cost and low vehicle reliability in the towed electric excavator in the prior art.

[0048] In some embodiments, the auxiliary driving force component 400 includes a first transmission assembly 410, a second transmission assembly 420 and an auxiliary driving force source 430. The power output shaft of the auxiliary driving force source 430 is connected to the generator 200 through the first transmission assembly 410 and connected to the compressor 300 through the second transmission assembly 420.

[0049] In this embodiment, by providing the first transmission assembly 410 and the second transmission assembly 420, an auxiliary driving force source 430 can be used to achieve synchronous driving of the generator 200 and the compressor 300, ensuring that the generator 200 and the compressor 300 are driven within the limited space of the vehicle platform 100. The generator 200 and the compressor 300 can be driven without changing the size of the vehicle platform 100, thus saving space and further reducing the cost of the whole machine.

[0050] Furthermore, the auxiliary driving force source 430 may be a motor. The output shaft of the motor is connected to the generator 200 through the first transmission assembly 410, so as to drive the generator 200 to rotate. The output shaft of the motor is also connected to the compressor 300 through the second transmission assembly 420, so as to drive the compressor 300 to rotate.

[0051] Preferably, the auxiliary driving force source 430 may be an asynchronous motor.

[0052] Furthermore, the auxiliary driving force source 430 is connected to the vehicle platform 100 via the shock absorber 900 .

[0053] In some embodiments, the power output shaft is provided with a first annular groove and a second annular groove around the rotation center axis of the power output shaft; the first transmission assembly 410 includes a first transmission belt; the second transmission assembly 420 includes a second transmission belt; the two ends of the first transmission belt are respectively sleeved on the first annular groove and the generator 200; the two ends of the second transmission belt are respectively sleeved on the second annular groove and the compressor 300. The driving of the generator 200 and the compressor 300 is realized by belt transmission, which has a simple structure and low cost.

[0054] In some other embodiments, the first transmission assembly 410 includes a first driving gear, a first transmission chain and a first driven gear; the first driving gear is connected to the power output shaft of the auxiliary driving force source 430, the first driven gear is connected to the rotating shaft of the generator 200, one end of the first transmission chain is sleeved on the first driving gear and meshed with the first driving gear, and the other end of the first transmission chain is sleeved on the first driven gear. The auxiliary driving force source 430 drives the first transmission chain to rotate through the first driving gear, the first transmission chain drives the first driven wheel to rotate, and the first driven wheel drives the generator 200 to rotate.

[0055] Furthermore, the second transmission assembly 420 includes a second driving gear, a second transmission chain and a second driven gear; the second driving gear is connected to the power output shaft of the auxiliary driving force source 430, the second driven gear is connected to the rotating shaft of the compressor 300, one end of the second transmission chain is sleeved on the second driving gear and meshed with the second driving gear, and the other end of the second transmission chain is sleeved on the second driven gear. The auxiliary driving force source 430 drives the second transmission chain to rotate through the second driving gear, the second transmission chain drives the second driven wheel to rotate, and the second driven wheel drives the compressor 300 to rotate.

[0056] In some embodiments, the power system 10 further includes an installation adjustment component; the installation adjustment component includes a first installation adjustment bracket 510 and a second installation adjustment bracket 520. The first installation adjustment bracket 510 is installed on the vehicle platform 100 and is located on one side of the auxiliary driving force source 430; the first installation adjustment bracket 510 has a first adjustment portion, which is connected to the generator 200 and is used to adjust the installation position of the generator 200 to change the tension of the first transmission belt. The second installation adjustment bracket 520 is installed on the vehicle platform 100 and is located on the other side of the auxiliary driving force source 430 away from the generator 200; the second installation adjustment bracket 520 has a second adjustment portion, which is connected to the compressor 300 and is used to adjust the installation position of the compressor 300 to change the tension of the second transmission belt.

[0057] In this embodiment, by providing the first mounting adjustment bracket 510 and the second mounting adjustment bracket 520, the generator 200 and the compressor 300 can be respectively provided on the vehicle platform 100, which can improve the installation flexibility of the generator 200 and the compressor 300. By providing the first adjustment part, the installation position of the generator 200 can be finely adjusted, and by providing the second adjustment part, the installation position of the compressor 300 can be finely adjusted, thereby adjusting the tension of the first transmission belt and the second transmission belt to prevent the transmission belt from slipping and breaking.

[0058] Furthermore, the first adjustment portion may be a waist-shaped hole. By inserting one end of the first fastening bolt into the waist-shaped hole and connecting the other end of the first fastening bolt to the generator 200, the position of the generator 200 can be finely adjusted to change the tension of the first transmission belt.

[0059] Furthermore, the second adjustment portion may be a waist-shaped hole. By inserting one end of the second fastening bolt into the waist-shaped hole and connecting the other end of the second fastening bolt to the compressor 300, the position of the compressor 300 can be finely adjusted to change the tension of the second transmission belt.

[0060] In some embodiments, the power system 10 further includes a fan power component 600 and a mechanical cooling fan 700. The fan power component 600 is installed on the vehicle platform 100. The mechanical cooling fan 700 is installed on the vehicle platform 100 and is used to dissipate heat for the radiator 30. The driving end of the fan power component 600 is connected to the mechanical cooling fan 700 and is used to drive the mechanical cooling fan 700 to rotate.

[0061] In this embodiment, by providing a fan power component 600 connected to the mechanical cooling fan 700, the mechanical cooling fan 700 can be used to replace the low-voltage electronic fan used in the existing towed electric excavator, thereby solving the problems of high cost, low vehicle environmental adaptability and poor reliability caused by the low-voltage electronic fan.

[0062] Further, the fan power component 600 includes a first mounting bracket 610 and a fan power source 620. The first mounting bracket 610 is mounted on the vehicle platform 100. The fan power source 620 is mounted on the first mounting bracket 610, and the fan power source 620 is connected to the mechanical cooling fan 700 to drive the mechanical cooling fan 700 to rotate forward or reverse.

[0063] In this embodiment, the installation height of the fan power source 620 can be adjusted according to actual needs by providing the first installation bracket 610, thereby increasing the contact area between the fan power source 620 and the vehicle platform 100 and improving the installation stability. The fan power source 620 provides power for the mechanical cooling fan 700. The fan power source 620 drives the mechanical cooling fan 700 to rotate forward to achieve heat dissipation of the radiator 30. The fan power source 620 drives the mechanical cooling fan 700 to rotate reversely, thereby enabling automatic dust removal of the mechanical cooling fan 700 to prevent the problem of poor heat dissipation of the vehicle due to blockage.

[0064] Specifically, the fan power source 620 may be a motor. Preferably, the fan power source 620 may be an asynchronous motor.

[0065] In some embodiments, the power system 10 further includes a main pump power component 800, which is installed on the vehicle platform 100 and is used for plugging and connecting with the hydraulic pump 20. The connection between the main pump power component 800 and the hydraulic pump 20 is achieved by plugging, which is convenient for disassembly and assembly.

[0066] Furthermore, the main pump power component 800 includes a permanent magnet synchronous motor 820 and a second mounting bracket 810; the permanent magnet synchronous motor 820 is connected to the vehicle platform 100 through the second mounting bracket 810, and the driving end of the permanent magnet synchronous motor 820 is used for plugging and connecting with the hydraulic pump 20. Specifically, the driving end of the permanent magnet synchronous motor 820 is provided with an internal spline, and the rotating shaft of the hydraulic pump 20 is formed with an external spline, and the internal spline and the external spline are plugged and matched with each other.

[0067] In this embodiment, the second mounting bracket 810 is provided to improve the installation flexibility of the permanent magnet synchronous motor 820. The permanent magnet synchronous motor 820 is used to drive the motor, so that the operating speed can be adjusted according to the working condition, so that the whole machine has high working efficiency and good controllability.

[0068] In some embodiments, the power system 10 further includes a shock absorber 900; the second mounting bracket 810 is connected to the vehicle platform 100 through the shock absorber 900. Since most electric excavators have relatively harsh working conditions and are often bumpy during travel, the power system 10 has high requirements for vibration testing, so the provision of the shock absorber 900 can reduce the impact of vibration on the power system 10.

[0069] A specific embodiment of the second aspect of the utility model provides a towed electric excavator, which comprises a power system 10 of any of the above embodiments.

[0070] Since the electric tow excavator of this embodiment includes the power system 10 of any of the above embodiments, it has at least the above advantages, which will not be described in detail here.

[0071] Furthermore, the towed electric excavator also includes a hydraulic pump 20 and a radiator 30. The hydraulic pump 20 is installed on the vehicle platform 100 and plug-connected with the permanent magnet synchronous motor 820, and the radiator 30 is installed on the vehicle platform 100. Specifically, the driving end of the permanent magnet synchronous motor 820 is provided with an internal spline, and the rotating shaft of the hydraulic pump 20 is formed with an external spline. The internal spline and the external spline are plugged and matched with each other, which is convenient for installation and disassembly, and improves the efficiency of assembly and disassembly. By using the permanent magnet synchronous motor 820 to drive, the working speed can be adjusted according to the working condition, so that the whole machine can have high working efficiency and good controllability. By setting the radiator 30, the heat dissipation of the whole machine is achieved.

[0072] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the utility model.

Claims

1. A power system, characterized in that: include: Vehicle platform (100); A generator (200) is installed on the vehicle platform (100) and is used to supply power to a low-voltage storage battery of the vehicle; A compressor (300) is installed on the vehicle platform (100) and is used to provide power for the vehicle air conditioning system; An auxiliary driving force component (400) is installed on the vehicle platform (100); the auxiliary driving force component (400) is respectively connected to the generator (200) and the compressor (300) and is used to drive the generator (200) and the compressor (300) to rotate.

2. The power system according to claim 1, characterized in that: The auxiliary driving force component (400) comprises: A first transmission assembly (410) and a second transmission assembly (420); An auxiliary driving force source (430), wherein a power output shaft of the auxiliary driving force source (430) is drivingly connected to the generator (200) via the first transmission assembly (410), and is drivingly connected to the compressor (300) via the second transmission assembly (420).

3. The power system according to claim 2, characterized in that: The power output shaft is provided with a first annular groove and a second annular groove around the rotation center axis of the power output shaft; the first transmission assembly (410) comprises a first transmission belt; the second transmission assembly (420) comprises a second transmission belt; The two ends of the first transmission belt are respectively sleeved on the first annular groove and the generator (200); the two ends of the second transmission belt are respectively sleeved on the second annular groove and the compressor (300).

4. The power system according to claim 3, characterized in that: The power system (10) further comprises an installation and adjustment component, wherein the installation and adjustment component comprises: A first mounting and adjusting bracket (510) is mounted on the vehicle platform (100) and is located on one side of the auxiliary driving force source (430); the first mounting and adjusting bracket (510) has a first adjusting portion, the first adjusting portion is connected to the generator (200) and is used to adjust the mounting position of the generator (200) to change the tension of the first transmission belt; A second mounting and adjusting bracket (520) is mounted on the vehicle platform (100) and is located on the other side of the auxiliary driving force source (430) away from the generator (200); the second mounting and adjusting bracket (520) has a second adjustment portion, which is connected to the compressor (300) and is used to adjust the mounting position of the compressor (300) to change the tension of the second transmission belt.

5. The power system according to any one of claims 1 to 4, characterized in that: Also includes: A fan power component (600) is installed on the vehicle platform (100); A mechanical cooling fan (700) is installed on the vehicle platform (100) and is used to dissipate heat for the radiator (30); a driving end of the fan power component (600) is connected to the mechanical cooling fan (700) and is used to drive the mechanical cooling fan (700) to rotate.

6. The power system according to claim 5, characterized in that: The fan power component (600) comprises: A first mounting bracket (610) mounted on the whole vehicle platform (100); A fan power source (620) is mounted on the first mounting bracket (610); the fan power source (620) is connected to the mechanical cooling fan (700) and is used to drive the mechanical cooling fan (700) to rotate forward or reverse.

7. The power system according to claim 5, characterized in that: Also includes: A main pump power component (800) is installed on the vehicle platform (100), and the main pump power component (800) is used for plugging and connecting with the hydraulic pump (20).

8. The power system according to claim 7, characterized in that: The main pump power component (800) comprises a permanent magnet synchronous motor (820) and a second mounting bracket (810); the permanent magnet synchronous motor (820) is connected to the vehicle platform (100) via the second mounting bracket (810), and the driving end of the permanent magnet synchronous motor (820) is used for plug-in connection with the hydraulic pump (20).

9. The power system according to claim 8, characterized in that: Also includes: A shock absorber (900), wherein the second mounting bracket (810) is connected to the whole vehicle platform (100) via the shock absorber (900).

10. A towed electric excavator, characterized in that: A power system (10) comprising any one of claims 1 to 9.

Images